I tried Compubank when they first started out. Must have been in beta! I got lousy service, unclear communication, and slow to get a card and all. I don't understand how you are getting extra points through compubank though. I couldn't figure out any way to get more points than I'm getting on affinity cards, beyond the initial $1,000 deposit charged to a credit card and the 500 bonus points. Simply withdrawing cash with the ATM card doesn't pay points, does it? The fact that there is a double clickmiles promo on DOES make them more attractive, but I'm also getting double AA miles with clickciti with a lot less hassle.
Please post if there is something I overlooked with this card.